<template>
  <div class="wrapper">
      <img src="http://www.dell-lee.com/imgs/vue3/user.png" class="wrapper__img" />
      <div class="wrapper__input">
        <input
        class="wrapper__input__content"
        placeholder="请输入用户名"
        v-model="username"
        />
      </div>
      <div class="wrapper__input">
        <input
        type="password"
        class="wrapper__input__content"
        placeholder="请输入密码"
        v-model="password"
        autocomplete="new-password"
        />
      </div>
      <div class="wrapper__login-button" @click="handleLogin">登录</div>
      <div class="wrapper__login-link" @click="handleRegisterClick">立即注册</div>
      <Toast v-if="show" :message="toastMessage"/>
  </div>
</template>

<script>
import { reactive, toRefs } from 'vue'
import { useRouter } from 'vue-router'
import { post } from '../../utils/request'
import Toast, { useToastEffect } from '../../components/Toast'

// 处理登录相关逻辑
const useLoginEffect = (showToast) => {
  const router = useRouter()
  const data = reactive({ username: '', password: '' })
  // 写法二 async表示函数是一个异步函数
  const handleLogin = async () => {
    try {
      const { username, password } = data
      if (username.trim().length === 0 || password.trim().length === 0) {
        showToast('请输入用户名或密码')
        return false
      }
      // await等待promise 对象执行完毕，然后拿到promise resolve 的值并进行返回，返回值拿到之后，它继续向下执行(用同步思维解决异步问题的方案)
      const result = await post('/api/user/login', {
        username: data.username,
        password: data.password
      })
      console.log(result)
      if (result?.errno === 0) {
        // localStorage本地存储
        localStorage.isLogin = true
        router.push({ name: 'Home' }) // 页面跳转
      } else {
        showToast('登录失败')
      }
    } catch (e) {
      showToast('请求失败')
    }
  }
  const { username, password } = toRefs(data)

  return { username, password, handleLogin }
}

// 处理注册跳转
const useRegisterEffect = () => {
  const router = useRouter()
  const handleRegisterClick = () => {
    router.push({ name: 'Register' })
  }
  return { handleRegisterClick }
}

export default {
  name: 'Login',
  components: { Toast },
  setup () {
    // 弹窗逻辑
    const { show, toastMessage, showToast } = useToastEffect()
    const { username, password, handleLogin } = useLoginEffect(showToast) // 登录逻辑
    // 注册逻辑
    const { handleRegisterClick } = useRegisterEffect()

    /* 写法一 import axios from 'axios'
    const router = useRouter()
    const handleLogin = () => {
      axios.post('https://www.fastmock.site/mock/ec090b403df8ff463c06b52cca53a6f7/jd/api/user/login', {
        username: data.username,
        password: data.password
      }).then(() => {
        // localStorage本地存储
        localStorage.isLogin = true
        router.push({ name: 'Home' }) // 页面跳转
      }).catch(() => {
        alert('登录失败')
      })
    }
    */
    return { username, password, handleLogin, handleRegisterClick, show, toastMessage }
  }
}
</script>

<style lang="scss" scoped>
@import '../../style/viriables.scss';
.wrapper {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%); // 这个元素里高度的50%
  &__img {
    display: block;
    width: .66rem;
    height: .66rem;
    margin: 0 auto .4rem auto;
  }
  &__input {
    height: .48rem;
    margin: 0 .4rem .16rem .4rem;
    padding: 0 .16rem;
    background: #F9F9F9;
    border: .01rem solid rgba(0,0,0,0.10);
    border-radius: .06rem;
    &__content {
      margin-top: .12rem;
      line-height: .22rem;
      border: none;
      outline: none;
      width: 100%;
      background: none;
      font-size: .16rem;
      color: $content-notice-fontcolor;
      &::placeholder { // 修饰符
        color: $content-notice-fontcolor;
      }
    }
  }
  &__login-button {
    margin: .32rem .4rem .16rem .4rem;
    line-height: .48rem;
    background: $btn-bgColor;
    box-shadow: 0 .04rem .08rem 0 rgba(0,145,255,0.32); // 素添加阴影：
    border-radius: .04rem;
    color: $bgColor;;
    font-size: .16rem;
    text-align: center;
  }
  &__login-link {
    text-align: center;
    font-size: .14rem;
    color: $content-notice-fontcolor;
  }
}
</style>
